I am searching my family tree on my grandmothers birth cert a woman has a differ

Question:

I am searching my family tree on my grandmothers birth cert a woman has a different name to her supposed mum?

has any one ever heard of what used to be known as sunday best names

Best Answer - Chosen by Asker: yes, but i think you will find the name on the certificate to be the correct 'birth' name and the one you need to trace your tree, good luck with this!